Door-equalizing device.



No. 669,907. Patented mm2, 190|.

u. n. L. wEnmcKe & F. w. ToBEY.

D008 EHUALIZING DEVICE.

(Applicaciun med Aug. s1, 1900.)

(Flo ilodel.)

OTTO H. L. WERNICKE AND FRED W. TOBEY, OF CINCINNATI, OHIO, AS- SIGNORS TO THE GLOBE-VVERNICKE COMPANY, OF SAME PLACE.

DooR-EQUALIZING DEVICE.

SPECIFICATION forming part of Letters Patent No. 669,907, dated March 12, 1901.

Application filed August 31, 1900. Serial No. 28,699. (No model.)

To @ZZ whom, it may concern:

Be it known that we, OTTO H. L. WERNICKE and FRED W. TOBEY, citizens of the United States, residing at Cincinnati, in the county of I-Iamilton'and State of Ohio, have invented new and useful Improvements in Door-Equalizing Devices, of which the following is a specification.

This invention relates to certain new and useful improvements in door-equalizing devices; and it consists of the novel combination and arrangement of parts hereinafter more specifically described, illustrated in the accompanying drawings, and particularly pointed out in the claims hereunto appended.

In describing the invention in detail reference is had to the accompanying drawings, forming a part of this specification, wherein like letters of reference indicate corresponding parts throughout the several views, and in which Figure 1 shows a plan view of a section of a bookcase provided with our door-equalizing device, the' door being slid back nearlyinto the case. Fig. 2 shows a plan view of the door drawn nearly out of the case. Fig. 3

shows a plan View, on an enlarged scale, of the door-equalizing device. Fig. 4 shows a side elevation of the door-equalizing device, illustratiug the connection ofthe spring to the arms; and Fig. 5 shows a bottom View or inverted plan view of the device. r

Similar letters refer to similar parts throughout the several views.

A represents the outer shell or case. This shell or case is provided with the sliding door B, which door when drawn out of the case is adapted to drop down and close the section. When raised in a horizontal position, as shown in Figs. 1 and 2,' it is adapted to slide into the case above the booksor other contents of the section.

H is a plate, preferably angle-shaped,which is secured to the rear wall of the section, the upper part being in a plane with the top of the section, the lower part, which is shown by H', being secured by suitable bolts or screws to the back Walls.

C C represent two laterally-swinging guidearms, which guide-arms are provided with the pinions E. The pinions E may be made integral with the guide-arms C or may be secured thereto. These pinions E E are provided with teeth which engage with each other, as shown in Figs. 3 and 5. The pinions are secured to the plate by means of the bolts or pivots G G.

S S represent two springs. The adjacent ends of the springs are secured to a loop I, as shown by Fig. 4, While the outer end of each spring is secured to the hook J, as shown in Fig. 4.

K K represent two connectingrods which secure the outer end of the guide-arms C to the inner or upper edge of the door, as shown in Fig. 2, in such a manner that the outer end of each of the arms C will be connected by a rod K to the inner edge of the door near the opposite and not the adjacent corner thereof.

The operation of our invention is as follows:

-The connecting-rods K K, together with the guide-arms C C, retain the door centrally and prevent the same from pressing against either end Wall of the case. The guide-arms being connected together by means of 'the pinions must necessarily move together, so that the strain or tension must necessarily be equal on each end of the door, holding or retaining the door in position and` forming a positive guide alike for each end of the door. The arrangement of the springs and levers is such that if pressure be applied to the door at one side to push the door into the case then both springs act together to draw the other end of the door into the case, and if force is applied to one side of the door to draw it out of the case the other side of the door is relieved from the tension of the springs. The action of the springs is to draw the door back into the case when it has been raised to a horizontal position, and even though one spring should exert greater tension than the other the tension at the outer end of each guide-arm must necessarily be the same. By raising the door to a horizontal position the action of the springs is exerted to draw the IOO cross each other, and as the door is drawn outwardly the tension becomes less direct upon the door, so the springs exert less tension when the door is drawn to its outermost position than when drawn half-way out. This feature is deemed of importance, as it prevents the necessity of too great force in drawing out the door. Thus by this construction the springs and guide-arms exert the least tension upon the door When the door is drawn entirely out and again when shoved entirely back into the case.

Having thus described our invention, what we claim to have in vented,and desire to secure by Letters Patent, is-

l. The combination with a case, of a door operating therein, a pair of laterally-swinging diverging guide-arms pivotally connected to the rear wall of said case and provided with pinions on their inner ends which intermesh one with the other, and rods for connecting the outer end of each of said arms to near the opposite corner of the inner edge of said door.

2. The combination with a case, of a door operating therein, a pair of simultaneouslyoperating laterallyswinging divergingguidearms pivoted to the rear wall of said case, springs connected to said case and guidearms, and rods for connecting the free ends of said arms to near the opposite corner of the inner edge of said door.

3. The combination with a case, of a door operating therein, a pair of laterally-swinging diverging guide-arms'pivotally connected to the rear wall of said case and provid ed with pinions on their inner ends which intermesh one with the other, springs connected to said case and guide-arms, and rods for connecting the outer end of each of said arms to near the opposite corner of the inner edge of said door.

4. The combination of a case having a plate secured to the rear wall thereof, and extending outwardly therefrom, a door operating in said case, a pair of laterally-swinging diverging arms pivotally mounted upon said plate and provided with pinions intermeshing one With the other for simultaneously operating the arms, and a pair of rods crossing each other and connected at one end to the outer end of said guide-arms and at their opposite end to the near corners of the inner edge of said door.

5. The combination of a case, of a plate secured to the rear wall thereof and extending outwardly therefrom, a pair ofswinging diverging guide-arms pivotally mounted upon said plate and provided with pinions on their inner ends intel-meshing one with the other, a pair of tension-springs connected at one end to said plate and at their opposite end to said guide-arms, a door operating in said case, and rods for connecting said guide-arms to said door, substantially as described.

6. In a door-equalizer, the combination of i a pair of laterally-moving divergiug guidearms, a pinion or gear carried by each of the arms at their pivoted end7 said pinions or gears moving together by the movement. of either of thearms, a pair of rods secured to the free ends of the said arms, crossing each other and attached to the inner edge of the door, near the ends thereof, substantially as described.

In testimony whereof We have hereunto set our hands in presence of two subscribing Witnesses.

OTTO H'. L. WERNICKE. FRED' W. TOBEY.

Witnesses:

OSCAR J. DBEYER, JEssIE MCARTHUR. 

